TLC3544, TLC3548

5-V ANALOG, 3-/5-V DIGITAL, 14-BIT, 200-KSPS, 4-/8-CHANNELS SERIAL

ANALOG-TO-DIGITAL CONVERTERS WITH 0-5 V (PSEUDODIFFERENTIAL) INPUTS

SLAS266C – OCTOBER 2000 – REVISED MAY 2003

2

POST OFFICE BOX 655303

description (continued)

In addition to being a high-speed ADC with versatile control capability, these devices have an on-chip analog

multiplexer (MUX) that can select any analog input or one of three self-test voltages. The sample-and-hold

function is automatically started after the fourth SCLK (normal sampling) or can be controlled by CSTART to

extend the sampling period (extended sampling). The normal sampling period can also be programmed as short

sampling (12 SCLKs) or long sampling (44 SCLKs) to accommodate the faster SCLK operation popular among

high-performance signal processors. The TLC3544 and TLC3548 are designed to operate with low power

consumption. The power saving feature is further enhanced with software power-down/ autopower-down

modes and programmable conversion speeds. The conversion clock (internal OSC) is built in. The converter

can also use an external SCLK as the conversion clock for maximum flexibility. The TLC3544 and TLC3548

have a 4-V internal reference. The converters are specified with unipolar input range of 0-V to 5-V when a 5-V

external reference is used.

AVAILABLE OPTIONS

PACKAGED DEVICES

TA

20-TSSOP

(PW)

20-SOIC

(DW)

24-SOIC

(DW)

24-TSSOP

(PW)

0

°C to 70°C

TLC3544CPW

TLC3544CDW

TLC3548CDW

TLC3548CPW

– 40

°C to 85°C

TLC3544IPW

TLC3544IDW

TLC3548IDW

TLC3548IPW

functional block diagram

Analog

MUX

4-V

Reference

Command

Decode

CMR (4 MSBs)

SAR

ADC

OSC

Conversion

Clock

FIFO

X8

Control

Logic

4-Bit

Counter

SDO

EOC/INT

DVDD AVDD

DGND AGND

CSTART

FS

CS

SCLK

SDI

CFR

REFM

BGAP

REFP

X8

A0

A1

A2

A3

A4

A5

A6

A7

X4

A0

A1

A2

A3

X

X

X

X